Evaporating system



May 12, 1925. 1,537,563 R. sUczEK EVAPORATING SYSTEM Original FiledMaIOh 17, 1921 2334 ATTORNEY.

Patented May 12, 1925.

IUNITED STATES PATENT OFFICE.

ROBERT SUCZEK, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO C. H. WHEELERMANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TIO-NOF PENNSYLVANIA.

EVAPORATING SYSTEM.

Original application led March 17,' 1921, Serial No. 453,111. Dividedand this application filed lJune 9, 1923. Serial No. 644,443.

To aZZ wh om t 'may concern:

Be it known that I, ROBERT SUCZEK, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented certain new and'useful Improvements in EvaporatingSystems, of which the following is a specification.

My invention relates to a method of and apparatus for yeffectingevaporation of a liquid by reducing the pressure thereon, or b vreducing the pressure thereon and applying heat thereto.

In accordance 'with my invention, an ejector, operating upon theprinciple of an aspirator, reduces the pressure upon the liquid to beevaporated by expansion of a suitable elastic motive fluid, preferablysteam, into jet formation', and entraining the gases or vapors from thespace above the liquid to be evaporated. and while the mixture of motiveand entrained fluids is undergoing compression. as by conversion ofvelocity into pressure. heat is abstracted from .the mixture anddelivered to the liquid to be evaporated. V

Further in accordance with my invention, the additional heat is'transferred to the liquid to be evaporated ,from the mixture of motiveand entra-ined fluids discharged by the ejector.

My invention resides in the method and apparatus of the characterhereinafter described and claimed. Q

This application is a division from my co-pending application Serial No.453,111, filed March 17, 1921.

For an understanding of my method, and

for an illustration of one of the variousv forms my apparatus may take,reference is to be had to the accompanying drawing, which is a verticalsectional view, parts in elevation. of apparatus embodying my inventionand utilizable for lthe practice of my method.

Referring to the drawing, E is an evaporator having the evaporatingchamber 1 containing the liquid L to be evaporated, the liquid beingdelivered to the chamber 1l through the tubes 2, of brass or other goodheat conducting material, communicating 'at their upper ends with thetube sheet 3 forming the bottom of the chamber 1, and at their lowerends with the tube sheet 4 through the pipe 6. The tube sheets 3 and l 4are spaced from each other within the shell of the evaporator E to formthe third chamber 7, fromwhich the distillate or condensed evaporatedliquid is conducted to suitable destination through the pipe 8.

'Communicating -With the chamber 1, in which there preferably exists a.vacuum or pressure less than atmospheric pressure, is the suctionchamber' 9 of the ejector apparatus comprising the motive fluid`expanding nozzle N and the diffuser or combining tube structure D, whichlatter discharges through the port 10 into the chamber 7. Elastic motivefluid under pressure, preferably7 steam, as live or high pressure steam,or exhaust or low pressure steam, is delivered4 throu'gh the pipeconnection 11 and strainer 15?. into the steam chest,13, from which itpasses through the nozzle N, by which it is expanded into je* formation.The motive fluid moving at high velocity in the form of a jet entrainsgases, and particularly vapors, from the chamber 1, producing andmaintaining a. desired absolute pressure therein preferably belowatmospheric pressure, thus inducing .evaporation of the liquid L, whoseboiling point is lowered by reduction of the pressure in the chamber 1.The mixture of motive fluid and elastic fluid, as vapor or gas from thechamber 1 entrained thereby, is delivered into the diffuser structure,where the mixture loses in velocity and gains in pressure, and iseventually discharged at a. pressure'higher than that in the chamber 1into the chamber 7, in which atmospheric pressure or a pressure above orbelow atmospheric pressure may cbt-ain or be maintained, as may bc"suitable or de# sirable.

Surrounding the diffuser structure D is the cooling jacket J provided atits upper end With the annular chamber 14 delivering cooling liquid,delivered bythe pipe 15 controlled by vavle 16, through a plurality oftubes orpipes 17 into the upper end of the cooling jacket. The annularchamber 18, at the lower end of the jacket J, receives the coolingmedium through a series of ports 19 and discharges it through the pipe 6to the chamber 5, from which it rises through the tubes 2, abstiiactingheat from the mixture discharged from the diuser D, and passes into theevaporating chamber 1.

By the structure described, it will be seen that the liquid to beevaporated, as water, sea water, oil, gasoleiie, or other liquid, or

ya solution, as of salt, sugar, etc., is de- -livered through the pipe15, and first abstracts heat fromthe mixture of motive and entrainedfluids-in its passage through the diffuser structure D, therebyeffecting by the cooling action of the liquid to be evaporated aneconomy in consumption of motive fluid utilized by the ejector, becauseof increase of density of the fluid traversing kthe diffuser and asexplained inV my aforesaid appli-l cation Serial No. 453,111 and inLetters Patent No. l1,282,977 October 29, 1918. The

liquid to be evaporated, having thus pre-- liminarily absorbed heat, yisdelivered through4 ipe 6 to the chamber 5 and thence increased, the risein temperature of the,-

to the tu es 2, where, as aforesaid, further heat is abstracted from'the mixture of motive and lentrained fluids discharged by the diffuserD. The liquid 'then reaches the eyaporating chamber L with itstemperature 'liquid assisting the evaporation. l, j In consequence,` theevaporation is enhancedjby theajbsorption of heat by the liquid to beeyaporated from the diffuser structure of the ejector, and is furtherenhanced by the heat absorbed from the ejector discharge, the heatabsorbed by lthe sult that less heat need be applied to the' liquidnecessitating a lesser degree of vacliquid while in the tubes 2 by thedischarge from the ejector, to effect the same liquid temperature in theevaporating chamber 1.

The vapor discharged by the ejector into' the chamber 7 is, therecondensed, forming the condensate C which is drawn off through the pipe8. The condensate C is distilled water, in case sea water, as uponshipboard, is evaporated and used for boiler4 feed,v

drinking or other purposes.

W'hile it is preferred that the liquid to be evaporated shalll firstabstract heat from the ejector, it will be understood that the liquid tobe evaporated may be introduced directlyl into the chamber 5, and aseparate and distinct cooling liquid may be circulated through thecooling jacket J, which may be desirable in case very low temperaturecooling liquid is required in the jacket J.

vliquid What I claim is: 1. The method of evaporating liquid, whichconsists in expanding motive fluid, as

steam, into jet formation, entraining therev by vapor evolved by saidliquid, converting velocity of the mixture of motive fluid and vaporinto pressure, and cooling said mixturewhile increasing in pressure.

l2. The method of evaporating liquid, which consists in expanding motivefluid, as steam, into jet formation; entraining thereby vapor evolved bysaid liquid, converting velocity of themixture of motive duid and` vaporinto pressure, cooling said mixture while increasing in ressure, anddelivering heat from said mixture to said liquid.

3, The method of evaporating liquid, which consists in expanding motivefluid,A as

steam, into jet formation, entraining tl1ere. by vapor evolved by saidliquid, converting*- velocity of the mixture of motive fluid and vaporinto pressure, and cooling said mixture while increasing in liquid to beevaporated.

pressure by the 4. The method of evaporating liquid,

which consists in expanding motive fluid, as

steam, into jet formation, entraining therebyvapor evolved by saidliquid, convertin velocity of the mixture of motive fluid an vapor intopressure, cooling said mixture While increasing in pressure'jbyl theliquid toy'be evaporated, and delivering heat from said mixture to saidliquid. .l

-5. Evaporator structure comprising a vapor chamber to which the liquidtobe evaporated is conducted ejector apparatus for withdrawing vaporfrom said chamber, heat transfer structure for heating the liquid t'bythe discharge from said ejector, and ..means` for cooling the diffuserstructure of said ejector.

6. Evaporator structure comprising a vapor chamber to which the liquidto be evaporated is conducted, ejector apparatus for withdrawing vaporfrom said chamber, said ejector apparatus comprising nozzle and diffuserstructure, and means for cooling llO the diffuser structure of saidejector by the 1 prior to its entry into saidvapor chamber. -1

7. Evaporator structure comprising a vapor chamber to which the liquidto beevaporated is conducted, ejector apparatus for withdrawing vaporfrom said chamber, said ejector apparatus comprising nozzle and diffuserstructure., heat transfer structure for heating the liquid bythedischarge from said ejector, andmeans for cooling the diffuser structureof said ejector by the liquid prior to`its entry into' said heattransfer structure.

' In testimony whereof I have hereunto affixed my signature this 23rdday of May ROBERT SUCZEK.

